/Engine/Source/Editor/SceneOutliner/Public/SSceneOutliner.h
Retrieve the filter at the specified index
A valid poiter to a filter if the index was valid
virtual [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FSceneOutlinerFilter](API\Editor\SceneOutliner\FSceneOutlinerFilter) > GetFilterAtIndex ( int32 Index )